package com.itheima.mapper;

import com.itheima.pojo.Emp;
import org.apache.ibatis.annotations.*;

import java.time.LocalDate;
import java.util.List;

@Mapper
public interface EmpMapper {

    //根据ID删除数据
    @Delete("delete from emp where id=#{id}")
    public void delete(Integer id);

    //新增员工
    @Options(useGeneratedKeys = true, keyProperty = "id")
    @Insert("insert into emp (username, name, gender, image, job, entrydate, dept_id, create_time, update_time)" +
            "values (#{username}, #{name},  #{gender}, #{image}, #{job}, #{entrydate}, #{deptId},#{createTime},#{updateTime})")
    public void insert(Emp emp);

    //更新员工
    @Update("update emp set username=#{username}, name=#{name}, gender=#{gender}, image=#{image}, " +
            "job=#{job}, entrydate=#{entrydate}, dept_id=#{deptId}, update_time=#{updateTime} where id = #{id}")
    public void update(Emp emp);
    /*=============================================================================*/

    //根据ID查询员工
    //开启mybatis的驼峰命名自动映射开关
    @Select("select * from emp where id = #{id} ")
    public Emp getById(Integer id);


    //解决数据封装
    /*//方案一：给字段起别名，让别名与实体类保持一致
    @Select("select id, username, password, name, gender, image, job, entrydate, dept_id deptId, create_time createTime, update_time updateTime from emp where id = #{id} ")
    public Emp getById(Integer id);*/

    /*//方案二：通过@Results，@Result注解手动映射封装
    @Results({
            @Result(column = "dept_id", property = "deptId"),
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })
    @Select("select * from emp where id = #{id} ")
    public Emp getById(Integer id);*/

    /*=============================================================================*/


    /*//条件查询员工
    //方式一
    @Select("select * from emp where name like '%${name}%' and gender = #{gender} and " +
            "entrydate between #{begin} and #{end} order by update_time desc")
    public List<Emp> list(String name, short gender, LocalDate begin, LocalDate end);*/



    /*//条件查询员工
    //方式二
    @Select("select * from emp where name like concat('%',#{name},'%') and gender = #{gender} and " +
            "entrydate between #{begin} and #{end} order by update_time desc")
    public List<Emp> list(String name, short gender, LocalDate begin, LocalDate end);*/


    //动态条件查询
    public List<Emp> list(String name, Short gender, LocalDate begin, LocalDate end);

    //动态更新员工
    public void update2(Emp emp);

    //批量删除员工
    public void deleteByIds(List<Integer> ids);
}
